Individually Driven Light Emitting Cells for Vehicle Lamp Modules
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Solution Overview
Problem
Conventional lamp units for vehicles face challenges in reducing dark regions and satisfying cut-off line regulations to avoid obstructing the driver's field of vision, leading to the need for complex designs and shades to manage light distribution.
Innovation Solution
A light emitting module with individually driven light emitting cells arranged in specific geometric patterns on a substrate, including triangular, tetragonal, and parallelogram-shaped light emitting surfaces, and an insulating layer to minimize dark regions and adjust light emission angles between 15° and 45°, allowing for efficient light distribution without shades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional lamp units use traditional light emitting modules, then the structure is simple, but dark regions are prominent and cut-off line regulations cannot be satisfied
Solution Approach 1:
The light emitting device is divided into multiple independently controllable light emitting cells arranged in a matrix pattern. Each cell can be individually driven to emit light, allowing precise control over light distribution patterns. This segmentation enables the creation of specific illumination patterns that reduce dark regions while meeting cut-off line regulations without requiring complex external shading structures.
Solution Approach 2:
Different regions of the light emitting device have different emission characteristics. By controlling specific light emitting cells in the matrix, the patent creates localized light emission patterns that address specific areas requiring illumination while maintaining darkness in other regions. This local quality control allows satisfaction of cut-off line regulations in specific directions while providing adequate illumination where needed.
2Illumination intensity
If shades are added to manage light distribution and satisfy cut-off line regulations, then illumination control improves, but device complexity increases
Solution Approach 1:
The patent extracts the light emission control function from external shading structures and integrates it directly into the light emitting device itself. By using individually controllable light emitting cells arranged in a matrix, the control of light distribution and cut-off line compliance is achieved through selective activation of cells rather than through physical shades, thereby reducing overall device complexity.
Solution Approach 2:
The patent replaces mechanical shading structures with an electrical control system. Instead of using physical shades to block or redirect light, the invention uses independent electrical control of individual light emitting cells in the matrix to achieve the desired light distribution patterns and cut-off line compliance, eliminating the need for mechanical components.
3Illumination intensity
If light emitting cells are arranged in specific geometric patterns, then dark regions are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The light emitting device is segmented into multiple light emitting cells arranged in a matrix pattern. This regular geometric arrangement provides clear positioning references that can be used during manufacturing and assembly, reducing the actual precision requirements compared to irregular patterns. The matrix structure allows for standardized mounting procedures while still achieving the desired light distribution characteristics.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces dark regions and complies with cut-off line regulations by optimizing light emission patterns, simplifying the lamp apparatus design and enhancing safety by ensuring unobstructed driver vision.
Implementation Method 1
a light emitting module includes a substrate and a plurality of light emitting devices disposed on the substrate, wherein at least one of the plurality of light emitting devices includes a plurality of light emitting cells
Data Source
AI summary
Disclosed is a light emitting module. The light emitting module includes a substrate and a plurality of light emitting devices disposed on the substrate, at least one of the plurality of light emitting devices includes a plurality of light emitting cells which are individually driven, and the plurality of light emitting cells include a light emitting structure including a first semiconductor layer, an active layer, and a second semiconductor layer, and has a light emitting surface emitting light.